Two U.S. security contractors involved in the shooting death of an Afghan civilian said they were pressured to say they had been drinking in order to protect the company's contract.

"There was no question as to, 'Were you drinking?' It was, 'I know you were drinking, I know this happened,' and then pretty much trying to force us into making a statement on that," Steven McClain told CNN's "The Situation Room with Wolf Blitzer" in a story to air on Wednesday.